Question

Y varies directly as the square of x and indirectly with z. If y is 8 when x is 4 and z is 16, find y when x is 8 and z is 4.

Answer 1

Answer:

(a + b + c + …)2 = a2 + b2 + c2 + … + 2(ab + ac + bc + ….) Laws of Exponents (am)(an) = am+n ; (ab)m